Hach Polymetron NA9600 sc Na+ Installationsanleitung Seite 32

3.6.7 Remove the plug from the air purge fitting
Note: Only do this task if the analyzer has an enclosure and does not have the optional cationic pump. Refer to
Figure 2 on page 10 to identify the cationic pump.
1. Remove the plug from the air purge fitting. Refer to
2. To keep the NEMA rating of the enclosure, do the steps that follow:
a. Connect a 0.3 m (1 ft) length of the supplied 6-mm tubing to the DIPA exhaust vent. Refer to
Figure 16 on page 31 to identify the DIPA exhaust vent.
b. Connect a 0.3 m (1 ft) length of the supplied 6-mm tubing to the air purge fitting.
3.6.8 Plumb the DIPA exhaust
Gas inhalation hazard. Plumb the DIPA exhaust vent to outside air or a fume hood to
prevent exposure to toxic gas.
Note: Only do this task if the analyzer has the optional cationic pump. Refer to
cationic pump.
For analyzers with an enclosure, use the supplied 6-mm OD tubing to connect the DIPA exhaust
vent to outside air or a fume hood. Refer to
For analyzers without an enclosure, use the supplied 6-mm OD tubing to connect the DIPA exhaust
port to outside air or a fume hood. Refer to
Figure 18 DIPA exhaust port—analyzer without enclosure
3.6.9 Connect the air purge (optional)
Note: Only do this optional task if the analyzer has an enclosure.
To keep dust and corrosion out of the instrument enclosure, supply clean, dry instrument-quality air
3
at 0.425 m /hour (15 scfh) to the air purge fitting with 6-mm OD plastic tubing. Refer to
32 English
Figure 19
W A R N I N G
Figure 16 on page 31 to identify the DIPA exhaust vent.
Figure 18.
on page 33.
Figure 2 on page 10 to identify the
Figure 19.